diff options
author | Matt A. Tobin <mattatobin@localhost.localdomain> | 2018-02-02 04:16:08 -0500 |
---|---|---|
committer | Matt A. Tobin <mattatobin@localhost.localdomain> | 2018-02-02 04:16:08 -0500 |
commit | 5f8de423f190bbb79a62f804151bc24824fa32d8 (patch) | |
tree | 10027f336435511475e392454359edea8e25895d /build/autoconf/compiler-opts.m4 | |
parent | 49ee0794b5d912db1f95dce6eb52d781dc210db5 (diff) | |
download | UXP-5f8de423f190bbb79a62f804151bc24824fa32d8.tar UXP-5f8de423f190bbb79a62f804151bc24824fa32d8.tar.gz UXP-5f8de423f190bbb79a62f804151bc24824fa32d8.tar.lz UXP-5f8de423f190bbb79a62f804151bc24824fa32d8.tar.xz UXP-5f8de423f190bbb79a62f804151bc24824fa32d8.zip |
Add m-esr52 at 52.6.0
Diffstat (limited to 'build/autoconf/compiler-opts.m4')
-rw-r--r-- | build/autoconf/compiler-opts.m4 | 316 |
1 files changed, 316 insertions, 0 deletions
diff --git a/build/autoconf/compiler-opts.m4 b/build/autoconf/compiler-opts.m4 new file mode 100644 index 000000000..5e495e107 --- /dev/null +++ b/build/autoconf/compiler-opts.m4 @@ -0,0 +1,316 @@ +dnl This Source Code Form is subject to the terms of the Mozilla Public +dnl License, v. 2.0. If a copy of the MPL was not distributed with this +dnl file, You can obtain one at http://mozilla.org/MPL/2.0/. + +dnl Add compiler specific options + +AC_DEFUN([MOZ_DEFAULT_COMPILER], +[ +dnl set DEVELOPER_OPTIONS early; MOZ_DEFAULT_COMPILER is usually the first non-setup directive + if test -z "$MOZILLA_OFFICIAL"; then + DEVELOPER_OPTIONS=1 + fi + MOZ_ARG_ENABLE_BOOL(release, + [ --enable-release Build with more conservative, release engineering-oriented options. + This may slow down builds.], + DEVELOPER_OPTIONS=, + DEVELOPER_OPTIONS=1) + +dnl Default to MSVC for win32 and gcc-4.2 for darwin +dnl ============================================================== +if test -z "$CROSS_COMPILE"; then +case "$target" in +*-mingw*) + if test -z "$CPP"; then CPP="$CC -E -nologo"; fi + if test -z "$CXXCPP"; then CXXCPP="$CXX -TP -E -nologo"; ac_cv_prog_CXXCPP="$CXXCPP"; fi + if test -z "$AS"; then + case "${target_cpu}" in + i*86) + AS=ml; + ;; + x86_64) + AS=ml64; + ;; + esac + fi + if test -z "$MIDL"; then MIDL=midl; fi + + # need override this flag since we don't use $(LDFLAGS) for this. + if test -z "$HOST_LDFLAGS" ; then + HOST_LDFLAGS=" " + fi + ;; +esac +fi +]) + +dnl ============================================================================ +dnl C++ rtti +dnl We don't use it in the code, but it can be usefull for debugging, so give +dnl the user the option of enabling it. +dnl ============================================================================ +AC_DEFUN([MOZ_RTTI], +[ +MOZ_ARG_ENABLE_BOOL(cpp-rtti, +[ --enable-cpp-rtti Enable C++ RTTI ], +[ _MOZ_USE_RTTI=1 ], +[ _MOZ_USE_RTTI= ]) + +if test -z "$_MOZ_USE_RTTI"; then + if test "$GNU_CC"; then + CXXFLAGS="$CXXFLAGS -fno-rtti" + else + case "$target" in + *-mingw*) + CXXFLAGS="$CXXFLAGS -GR-" + esac + fi +fi +]) + +dnl ======================================================== +dnl = +dnl = Debugging Options +dnl = +dnl ======================================================== +AC_DEFUN([MOZ_DEBUGGING_OPTS], +[ + +if test -z "$MOZ_DEBUG" -o -n "$MOZ_ASAN"; then + MOZ_NO_DEBUG_RTL=1 +fi + +AC_SUBST(MOZ_NO_DEBUG_RTL) + +MOZ_DEBUG_ENABLE_DEFS="DEBUG TRACING" +MOZ_ARG_WITH_STRING(debug-label, +[ --with-debug-label=LABELS + Define DEBUG_<value> for each comma-separated + value given.], +[ for option in `echo $withval | sed 's/,/ /g'`; do + MOZ_DEBUG_ENABLE_DEFS="$MOZ_DEBUG_ENABLE_DEFS DEBUG_${option}" +done]) + +if test -n "$MOZ_DEBUG"; then + if test -n "$COMPILE_ENVIRONMENT"; then + AC_MSG_CHECKING([for valid debug flags]) + _SAVE_CFLAGS=$CFLAGS + CFLAGS="$CFLAGS $MOZ_DEBUG_FLAGS" + AC_TRY_COMPILE([#include <stdio.h>], + [printf("Hello World\n");], + _results=yes, + _results=no) + AC_MSG_RESULT([$_results]) + if test "$_results" = "no"; then + AC_MSG_ERROR([These compiler flags are invalid: $MOZ_DEBUG_FLAGS]) + fi + CFLAGS=$_SAVE_CFLAGS + fi + + MOZ_DEBUG_DEFINES="$MOZ_DEBUG_ENABLE_DEFS" +else + MOZ_DEBUG_DEFINES="NDEBUG TRIMMED" +fi + +AC_SUBST_LIST(MOZ_DEBUG_DEFINES) + +]) + +dnl A high level macro for selecting compiler options. +AC_DEFUN([MOZ_COMPILER_OPTS], +[ + MOZ_DEBUGGING_OPTS + MOZ_RTTI +if test "$CLANG_CXX"; then + ## We disable return-type-c-linkage because jsval is defined as a C++ type but is + ## returned by C functions. This is possible because we use knowledge about the ABI + ## to typedef it to a C type with the same layout when the headers are included + ## from C. + _WARNINGS_CXXFLAGS="${_WARNINGS_CXXFLAGS} -Wno-unknown-warning-option -Wno-return-type-c-linkage" +fi + +if test -n "$DEVELOPER_OPTIONS"; then + MOZ_FORCE_GOLD=1 +fi + +MOZ_ARG_ENABLE_BOOL(gold, +[ --enable-gold Enable GNU Gold Linker when it is not already the default], + MOZ_FORCE_GOLD=1, + MOZ_FORCE_GOLD= + ) + +if test "$GNU_CC" -a -n "$MOZ_FORCE_GOLD"; then + dnl if the default linker is BFD ld, check if gold is available and try to use it + dnl for local builds only. + if $CC -Wl,--version 2>&1 | grep -q "GNU ld"; then + GOLD=$($CC -print-prog-name=ld.gold) + case "$GOLD" in + /*) + ;; + *) + GOLD=$(which $GOLD) + ;; + esac + if test -n "$GOLD"; then + mkdir -p $_objdir/build/unix/gold + rm -f $_objdir/build/unix/gold/ld + ln -s "$GOLD" $_objdir/build/unix/gold/ld + if $CC -B $_objdir/build/unix/gold -Wl,--version 2>&1 | grep -q "GNU gold"; then + LDFLAGS="$LDFLAGS -B $_objdir/build/unix/gold" + else + rm -rf $_objdir/build/unix/gold + fi + fi + fi +fi +if test "$GNU_CC"; then + if $CC $LDFLAGS -Wl,--version 2>&1 | grep -q "GNU ld"; then + LD_IS_BFD=1 + fi +fi + +AC_SUBST([LD_IS_BFD]) + +if test "$GNU_CC"; then + if test -z "$DEVELOPER_OPTIONS"; then + CFLAGS="$CFLAGS -ffunction-sections -fdata-sections" + CXXFLAGS="$CXXFLAGS -ffunction-sections -fdata-sections" + fi + CFLAGS="$CFLAGS -fno-math-errno" + CXXFLAGS="$CXXFLAGS -fno-exceptions -fno-math-errno" + + if test -z "$CLANG_CC"; then + case "$CC_VERSION" in + 4.*) + ;; + *) + # Lifetime Dead Store Elimination level 2 (default in GCC6+) breaks Gecko. + # Ideally, we'd use -flifetime-dse=1, but that means we'd forcefully + # enable it on optimization levels where it would otherwise not be enabled. + # So we disable it entirely. But since that would mean inconsistency with + # GCC5, which has level 1 depending on optimization level, disable it on + # GCC5 as well, because better safe than sorry. + # Add it first so that a mozconfig can override by setting CFLAGS/CXXFLAGS. + CFLAGS="-fno-lifetime-dse $CFLAGS" + CXXFLAGS="-fno-lifetime-dse $CXXFLAGS" + ;; + esac + fi +fi + +dnl ======================================================== +dnl = Identical Code Folding +dnl ======================================================== + +MOZ_ARG_DISABLE_BOOL(icf, +[ --disable-icf Disable Identical Code Folding], + MOZ_DISABLE_ICF=1, + MOZ_DISABLE_ICF= ) + +if test "$GNU_CC" -a "$GCC_USE_GNU_LD" -a -z "$MOZ_DISABLE_ICF" -a -z "$DEVELOPER_OPTIONS"; then + AC_CACHE_CHECK([whether the linker supports Identical Code Folding], + LD_SUPPORTS_ICF, + [echo 'int foo() {return 42;}' \ + 'int bar() {return 42;}' \ + 'int main() {return foo() - bar();}' > conftest.${ac_ext} + # If the linker supports ICF, foo and bar symbols will have + # the same address + if AC_TRY_COMMAND([${CC-cc} -o conftest${ac_exeext} $LDFLAGS -Wl,--icf=safe -ffunction-sections conftest.${ac_ext} $LIBS 1>&2]) && + test -s conftest${ac_exeext} && + objdump -t conftest${ac_exeext} | awk changequote(<<, >>)'{a[<<$>>6] = <<$>>1} END {if (a["foo"] && (a["foo"] != a["bar"])) { exit 1 }}'changequote([, ]); then + LD_SUPPORTS_ICF=yes + else + LD_SUPPORTS_ICF=no + fi + rm -rf conftest*]) + if test "$LD_SUPPORTS_ICF" = yes; then + _SAVE_LDFLAGS="$LDFLAGS -Wl,--icf=safe" + LDFLAGS="$LDFLAGS -Wl,--icf=safe -Wl,--print-icf-sections" + AC_TRY_LINK([], [], + [LD_PRINT_ICF_SECTIONS=-Wl,--print-icf-sections], + [LD_PRINT_ICF_SECTIONS=]) + AC_SUBST([LD_PRINT_ICF_SECTIONS]) + LDFLAGS="$_SAVE_LDFLAGS" + fi +fi + +dnl ======================================================== +dnl = Automatically remove dead symbols +dnl ======================================================== + +if test "$GNU_CC" -a "$GCC_USE_GNU_LD" -a -z "$DEVELOPER_OPTIONS"; then + if test -n "$MOZ_DEBUG_FLAGS"; then + dnl See bug 670659 + AC_CACHE_CHECK([whether removing dead symbols breaks debugging], + GC_SECTIONS_BREAKS_DEBUG_RANGES, + [echo 'int foo() {return 42;}' \ + 'int bar() {return 1;}' \ + 'int main() {return foo();}' > conftest.${ac_ext} + if AC_TRY_COMMAND([${CC-cc} -o conftest.${ac_objext} $CFLAGS $MOZ_DEBUG_FLAGS -c conftest.${ac_ext} 1>&2]) && + AC_TRY_COMMAND([${CC-cc} -o conftest${ac_exeext} $LDFLAGS $MOZ_DEBUG_FLAGS -Wl,--gc-sections conftest.${ac_objext} $LIBS 1>&2]) && + test -s conftest${ac_exeext} -a -s conftest.${ac_objext}; then + if test "`$PYTHON -m mozbuild.configure.check_debug_ranges conftest.${ac_objext} conftest.${ac_ext}`" = \ + "`$PYTHON -m mozbuild.configure.check_debug_ranges conftest${ac_exeext} conftest.${ac_ext}`"; then + GC_SECTIONS_BREAKS_DEBUG_RANGES=no + else + GC_SECTIONS_BREAKS_DEBUG_RANGES=yes + fi + else + dnl We really don't expect to get here, but just in case + GC_SECTIONS_BREAKS_DEBUG_RANGES="no, but it's broken in some other way" + fi + rm -rf conftest*]) + if test "$GC_SECTIONS_BREAKS_DEBUG_RANGES" = no; then + DSO_LDOPTS="$DSO_LDOPTS -Wl,--gc-sections" + fi + else + DSO_LDOPTS="$DSO_LDOPTS -Wl,--gc-sections" + fi +fi + +# bionic in Android < 4.1 doesn't support PIE +# On OSX, the linker defaults to building PIE programs when targetting OSX 10.7+, +# but not when targetting OSX < 10.7. OSX < 10.7 doesn't support running PIE +# programs, so as long as support for OSX 10.6 is kept, we can't build PIE. +# Even after dropping 10.6 support, MOZ_PIE would not be useful since it's the +# default (and clang says the -pie option is not used). +# On other Unix systems, some file managers (Nautilus) can't start PIE programs +if test -n "$gonkdir" && test "$ANDROID_VERSION" -ge 16; then + MOZ_PIE=1 +else + MOZ_PIE= +fi + +MOZ_ARG_ENABLE_BOOL(pie, +[ --enable-pie Enable Position Independent Executables], + MOZ_PIE=1, + MOZ_PIE= ) + +if test "$GNU_CC" -a -n "$MOZ_PIE"; then + AC_MSG_CHECKING([for PIE support]) + _SAVE_LDFLAGS=$LDFLAGS + LDFLAGS="$LDFLAGS $DSO_PIC_CFLAGS -pie" + AC_TRY_LINK(,,AC_MSG_RESULT([yes]) + [MOZ_PROGRAM_LDFLAGS="$MOZ_PROGRAM_LDFLAGS -pie"], + AC_MSG_RESULT([no]) + AC_MSG_ERROR([--enable-pie requires PIE support from the linker.])) + LDFLAGS=$_SAVE_LDFLAGS +fi + +AC_SUBST(MOZ_PROGRAM_LDFLAGS) + +dnl ASan assumes no symbols are being interposed, and when that happens, +dnl it's not happy with it. Unconveniently, since Firefox is exporting +dnl libffi symbols and Gtk+3 pulls system libffi via libwayland-client, +dnl system libffi interposes libffi symbols that ASan assumes are in +dnl libxul, so it barfs about buffer overflows. +dnl Using -Wl,-Bsymbolic ensures no exported symbol can be interposed. +if test -n "$GCC_USE_GNU_LD"; then + case "$LDFLAGS" in + *-fsanitize=address*) + LDFLAGS="$LDFLAGS -Wl,-Bsymbolic" + ;; + esac +fi + +]) |